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Adsorption of U(VI) on bentonite in simulation environmental conditions
Wang, Jiaquan1; Chen, Zhi1; Shao, Dadong2; Li, Yuying3; Xu, Zimu1; Cheng, Cheng2; Asiri, Abdullah M.4; Marwani, Hadi M.4; Hu, Shuheng1
2017-09-01
发表期刊JOURNAL OF MOLECULAR LIQUIDS
卷号242期号:页码:678-684
摘要The bentonite derived from Huangshan County was used as adsorbent for the adsorption of uranium (U(VI)). The effect of environmental factors, such as contact time, pH, ionic strength, HA and reaction temperature, on U(VI) adsorption on bentonite surface was investigated in detail. The adsorption capability of bentonite for U(VI) is obviously rest with pH value and ionic strength. The presence of HA in solution strongly enhance and reduce the adsorption of U(VI) on bentonite at low and high pH, respectively. The Langmuir and Freundlich models were applied to simulate the adsorption isotherms of U(VI) at three different temperatures of 298 +/- 1, 318 +/- 1 and 338 +/- 1 K, respectively. The thermodynamic parameters (Delta H-0, Delta G(0) and Delta S-0) calculated from the temperature-dependence adsorption isotherms indicates that U(VI) adsorption on bentonite is an endothermic and spontaneous process. At pH < 7, the adsorption of U(VI) was dominated by the outer-sphere surface complexation and ion exchange with H+/Na+ on bentonite surfaces; At pH > 7, the inner-sphere surface complexation was the main adsorption mechanism. Based on the experimental analysis results, bentonite is an appropriate material for the enrichment and solidification of U(VI) ions. The results are important for the radioactive waste management. (C) 2017 Published by Elsevier B.V.
文章类型Review
关键词u(Vi) Bentonite Ha Radioactive Waste Management Adsorption
WOS标题词Science & Technology ; Physical Sciences
资助者NSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872) ; NSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872)
DOI10.1016/j.molliq.2017.07.048
关键词[WOS]HUMIC-ACID ; AQUEOUS-SOLUTIONS ; IONIC-STRENGTH ; SORPTION BEHAVIOR ; ENHANCED REMOVAL ; FACILE SYNTHESIS ; NUCLEAR-ENERGY ; PH ; CLAY ; TEMPERATURE
收录类别SCI
语种英语
资助者NSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872) ; NSAF(U1530131) ; National Natural Science Foundation of China(11675210) ; China Postdoctoral Science Foundation(2015M582769X13 ; 2016T90872)
WOS研究方向Chemistry ; Physics
WOS类目Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号WOS:000412607300074
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.hfcas.ac.cn:8080/handle/334002/33779
专题中科院等离子体物理研究所
作者单位1.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
3.Wuyi Univ, Sch Chem & Environm Engn, Jiangmen 529020, Peoples R China
4.King Abdulaziz Univ, Chem Dept, Fac Sci, Jeddah 21589, Saudi Arabia
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Wang, Jiaquan,Chen, Zhi,Shao, Dadong,et al. Adsorption of U(VI) on bentonite in simulation environmental conditions[J]. JOURNAL OF MOLECULAR LIQUIDS,2017,242(无):678-684.
APA Wang, Jiaquan.,Chen, Zhi.,Shao, Dadong.,Li, Yuying.,Xu, Zimu.,...&Hu, Shuheng.(2017).Adsorption of U(VI) on bentonite in simulation environmental conditions.JOURNAL OF MOLECULAR LIQUIDS,242(无),678-684.
MLA Wang, Jiaquan,et al."Adsorption of U(VI) on bentonite in simulation environmental conditions".JOURNAL OF MOLECULAR LIQUIDS 242.无(2017):678-684.
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